diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5fffde046b..843be78ce9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,20 +2,9 @@
 
 ## [Unreleased]
 
-### ✨ New Features
-
-- **feat(providers):** add Claude Fable 5 (`claude-fable-5`) — wires the new flagship model across the full pipeline: `cc` and `kiro` provider registries (1M context, 128k output), pricing constants, model spec (adaptive thinking, vision, tool use), fast mode, 1M-context beta header, fallback chain (`claude-fable-5 → claude-opus-4-8 → claude-opus-4-7 → claude-sonnet-4-6`), and cost data.
-
-### 🔧 Bug Fixes
-
-- **fix(translator):** scope the Gemini `thoughtSignature` bypass to the Antigravity/CLI path and unwrap array-shaped Gemini error bodies — signature-less historical tool calls on Antigravity/CLI are emitted as native parts carrying the `skip_thought_signature_validator` sentinel (preventing upstream 400s). (The standard Gemini direct path was kept on text/context representation here, then switched to native by #3569 below.) ([#3560](https://github.com/diegosouzapw/OmniRoute/pull/3560) — thanks @oyi77 and @Six7Day via [#3414](https://github.com/diegosouzapw/OmniRoute/pull/3414))
-- **fix(translator):** the standard Gemini direct path now maps historical tool calls to **native** `functionCall`/`functionResponse` parts instead of inert text. The previous text serialization (`[tool_history_call: …]` / "Historical tool-call record only …") leaked into the model's visible output (the model echoed the annotation text). A live test against the real Gemini API confirmed thinking models accept signature-less native `functionCall` parts (`gemini-2.5-flash` returns 200 even with `tools` + `thinkingConfig`), so the text mode is no longer needed as the default and the leak is gone. The Antigravity/CLI sentinel path (#3560) is untouched. ([#3569](https://github.com/diegosouzapw/OmniRoute/pull/3569) — thanks @hartmark)
-- **fix(auto-update):** the self-update flow now resolves a stable project root instead of the launch directory — `resolveProjectRoot` walks up from the module's own location (`__dirname`) to the nearest `package.json`/`.git` rather than trusting `process.cwd()` (which could point anywhere the process was started from), and every `git`/`npm`/`pm2` step in `version/route.ts` runs against that `PROJECT_ROOT`. The original resolver fell through to `return cwd` on every branch, making `PROJECT_ROOT` a no-op; the walker (with TDD coverage) fixes that. ([#3561](https://github.com/diegosouzapw/OmniRoute/pull/3561) — thanks @oyi77; `PROJECT_ROOT` originally introduced + `version/route.ts` call sites wired in [#3423](https://github.com/diegosouzapw/OmniRoute/pull/3423) — thanks @ViFigueiredo)
-- **fix(plugins):** wire plugin lifecycle hooks (`onInstall`/`onActivate`/`onDeactivate`/`onUninstall`) in the loader so `manager.ts` can register them with `emitHook` — they were declared in the manifest schema and dispatched by the manager, but the loader never built the `plugin.onX` methods, leaving the lifecycle hooks declared-but-dead. Also addresses #3518 review comments (redundant `RegExp(/.../)` → literals, `logs/[id]` route awaits the Next route `params`, indentation). ([#3562](https://github.com/diegosouzapw/OmniRoute/pull/3562) — thanks @oyi77)
-
 ---
 
-## [3.8.20] — Unreleased
+## [3.8.20] — 2026-06-10
 
 ### ✨ New Features
 
diff --git a/docs/reference/openapi.yaml b/docs/reference/openapi.yaml
index ad52734f88..a93fb1dea2 100644
--- a/docs/reference/openapi.yaml
+++ b/docs/reference/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: OmniRoute API
-  version: 3.8.20
+  version: 3.8.21
   description: |
     OmniRoute is a local-first AI API proxy router. It provides an OpenAI-compatible
     endpoint that routes requests to multiple AI providers with load balancing,
diff --git a/electron/package.json b/electron/package.json
index d6c2290c1f..4d007c3c13 100644
--- a/electron/package.json
+++ b/electron/package.json
@@ -1,6 +1,6 @@
 {
   "name": "omniroute-desktop",
-  "version": "3.8.20",
+  "version": "3.8.21",
   "description": "OmniRoute Desktop Application",
   "main": "main.js",
   "author": {
diff --git a/open-sse/package.json b/open-sse/package.json
index 09ebc933a8..d3ac81a28d 100644
--- a/open-sse/package.json
+++ b/open-sse/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@omniroute/open-sse",
-  "version": "3.8.20",
+  "version": "3.8.21",
   "description": "Express SSE sidecar for OmniRoute — handles streaming, protocol translation, and provider orchestration",
   "type": "module",
   "main": "index.js",
diff --git a/package-lock.json b/package-lock.json
index 6469f56293..fa09e1edb8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "omniroute",
-  "version": "3.8.20",
+  "version": "3.8.21",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "omniroute",
-      "version": "3.8.20",
+      "version": "3.8.21",
       "hasInstallScript": true,
       "license": "MIT",
       "workspaces": [
@@ -21587,7 +21587,7 @@
     },
     "open-sse": {
       "name": "@omniroute/open-sse",
-      "version": "3.8.20"
+      "version": "3.8.21"
     }
   }
 }
diff --git a/package.json b/package.json
index aec3594573..f6b583af0e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "omniroute",
-  "version": "3.8.20",
+  "version": "3.8.21",
   "description": "Unified AI router with 160+ providers, RTK+Caveman compression, auto fallback, MCP/A2A, desktop, PWA, and OpenAI-compatible APIs.",
   "type": "module",
   "bin": {